Machine for refacing and smoothing solid truck tires



Nov. 23, 1925. 1,608,334

A. E. PALIN ET AL MACHINE FOR REFACING AND SMOOTHING SOLID TRUCK TIRES Filed June 18. 1925 2 Sheets-Sheet 1 A. E. PALIN ET AL MACHINE FOR REFACING AND SMOOTHING SOLID TRUCK TIRES Nov. 23 192s. 1,608,334

.Filed June 18, 1925 2 Sheets-Sheet 2 of Figure 1,

Figure 4 is a longitudinal section through Patented Nov. 23, 1926.

UNITE STATES PATENT oFFicE.

ALFRED n. PALIN AND FRANK n. PAL-IN, or SANTA ROSA, CALIFORNIA.

MACHINE FOR REFACING AND SMOOTHING SOLID TRUCK TIRES.

Application filed June 18, 1925. Serial No. 38,120.

This invention relates to a solid truck tire trimming apparatus, and has for itsprinoipal object to provide a machine which w ll reface and smooth the solid truck tires while they are still on the truck.

Another important object of the invention is'to' provide a solid tire trimming apparatus of this nature which embodiesa frame having a carriage movable therein w th means-associated therewith foractuating it transverselyof the frame, said carriage adjustably supporting trimming means. 7

Another important object of the invention is to provide a trimming apparatus of this nature having a main trimming knife WhlCll'iS adjustably mounted and movable acrossthe tread of the tire, and side trimmers for cutting away the loose rubber which has been trimmed by the main cutter from the tire tread,

A still further object of the invention is to provide a machine for refacing and smoothing solid' truck tires while the tires are on the truck wheels, which is exceedingly simple in its construction, easy to manipulate, thoroughly reliable and eflicient in its operation, nor likely to easilybecome out of order, inexpensive to operate and man ufacture, strong, durable, and otherwise well adapted to the purpose for which it 1s designed.

With the above and numerous other objects in view as will appear as the description proceeds the invention resides in certain novelfeatures of construction, and in the combination and arrangement of parts as will be hereinafter more fully described and claimed.

In the drawing Figure 1 is a top plan View of the apparatus embodying the features'of our invention,

Figure 2 is a side elevation thereof, Figure 3 is a longitudlal' sectlonta'ken therethrou'gh substantially on the line 33 the-frame and the carriage of the apparatus,

Figure'5 is an end elevation of the apparatus, and o Figure 6 is a detail perspective view of oneof the side trimming knives;

Referring to the drawing in detaihit will be seen thatA designates generallyfa frame which is adapted to be supported above the ground on a suitable stand (not shown) so as to extend in a horiz'ontalplaiie' in approximate alignment with theaxis of a truck wheel when a cked up, 7 This stand may be of any suitable construction and does not form a part of our invention: A carriage 1 designated generally by the letter B is mountedinthe frame to travel transversely thereof. This carriage extendslongitudinally of the frame as is clearly seen in Figure 1.

Referring now particularly to the frame A it will be seen that numerals 5 designate the two longitudinally extending side bars, which" are preferably constructed of U- shaped angle irons, and have their ends connected by the end bars 6. At each end of the frame there are located two end bars 6, one on the upper edges of the'bars '5, and one on the lower edges thereof. The spaces be tween these'end bars 6 form ways in which are slidable the ends of the carriage B. A pair of threaded shafts 7 arefjournaled transversely across the frame in the side bars 5 in parallel spaced relation to each other, one shaft being located acent each pair of end bars 6. The shafts 7 extend through one of the side bars 5 and have onthe extended ends sprockets 8 over which is trained a chain 9. A crank 10 is provided on one shaft 7 adjacent its sprocket 8 so that the shafts rotate in unison with. each other.

Referring now particularly to the con struction of the carriage B it will be seen that numerals 12 represent two beams which are preferably constructed of U-shaped channel irons having their longitudinaledges disposed inabutment with each other, thereby forming a way for receiving holder 13.

These beams 12 are held together by bolts 14 or in any other suitable manner. The ends of the'beams 12 are slidable betweenthe end" bars 6 as is clearly indicated in Figures 3 and 4. The threaded shafts 7. extend transversely through the beams 12, and are threadingl'y engaged therewith so that by turning-the crank 10,'the beams may be moved transversely of the frame. A pair of blocks zare located one on each side of. the carriage B, bein fixedto the forward ends of the beams 12 by means of one of the bolts 1.4,

as is clearly indicated in Figure 3. A loop strap 16 is formed at each end of each block 15. Side trimmer or cutter shanks 17 are slidable over the blocks 15 through the loops 16 and have lateral extensions 18 at one end for riding on the sides of the beams 12, as

is clearly indicated in Figure 1, and for enthereof in the other direction and consequently since the projection 18 of one shank will engage the adjacent bolt lt and will be stopped, only one shank 17 will be projected at a time.

The holder 13 is constructed at its forward end with a block 22 which slidably receives shank 23 of a triangular shaped blade 2a. A set screw25 extends through the block 22 and is adapted to bind on the shank 23 in order that it may be adjusted in relation to the block. This screw 25 extends upwardly throughout cuts 26 provided in the upper portions of the beams 12 as is shown particularly in Figure 1. The blade 24 is in the form of an isoscelestriangle and has its two upper edgessharpened as will be seen in Figure 1. The rear end of the holder is provided with an upstanding ear 28 which threadedly receives a threaded rod 29 threaded through a block 30 provided in the rear ends of the beams 12 and having its end oflset as at 31 to form a crank. The swivel connection of this rod 29 with the offset eX tension'l28 will allow the rod 29 when turned to move the holder 13 longitudinally between the beams 12. Springs 32 are attached to the ends of the shanks 17 as at 33 and to the rear ends of the beams 12, and tend to normally hold the side cutter shanks 17 in a retracted position, that is with their extensions 18 in abutment 'with the stop bolt 14. The forward ends of these shanks are beveled and sharpened as indicated at 33. The

shanks "17 are provided with elongated slots 3 through which project the threaded shafts 7.

Referring now particularly to the use of the apparatus, it will be seen that when it is supported in a horizontal plane above the grounded approximately the same level with the axis of a jacked up truck wheel, that the wheel is jacked up so that] its entire periphery is in close proximity to the knife 2 1. The knife 24 is then adjusted in' relation to the periphery of the tire depending upon the desired depth of the cut by means ofthe threaded rod 29. V The carriage is located so that the cutter 243s to one side of the tire so that as the wheel is run through the usual truck niechanisnn the handle or crank 10 turned so that the carriage moves toward the wheel and thusthe cutter-21 will be moved transversely across the periphery of the tire shaving or trimming off a portion thereof. iVhen the blade 2% has moved a distance in travelling transversely on the frame A, one'of the side trimmers may be brought into play as previously indicated for trimming off the loose strip cut by the cutter 2 1. In using the apparatus it is preferable to work from one side to the center, and then from the other sideto the center of the tire.

A. slit is cut in the side ofthe tire to the extent ofabout one inch" at which time the knife 24; is stopped and the side knife' is hrcught forward by means of the lever for eliminating this one inch strip of rubber which will fall to the ground, then another inch is cut with the knife 24 and so on across the tire. By using the side knives thekmfe 24: is always kept clear and there is no danger enumerable as desirable in the statement of the inventlon and the above description. It

is apparent that numerous changes in the: cletails of construction, and in the combination and arrangement of parts may be resorted to without departing from the spirit of the invention and the scope of the invention as hereinafter claimed or sacrificing any of its advantages.

Havingthus described the invention what ters Patent is V 1. An apparatus of the class described including a frame, a carriage located longitudinally in the'frame, means for moving the carriage transversely of the frame, a holder slidable longitudinally in the carriage, means for adjusting the holder longitudinally-of the carriage, a cutter carried by saidholder, a pair of cutters located at the sides of the carriage, and means for alternately operating the side cutters. f c

An apparatus ofthe class described including a frame, a carriagefmounted in the frame, means for adjusting the carriage transversely of the frame, a cutter ca 'ried by the carriage means for adjusting the cutter we claim as new and desire to secure by Leti V the cutters whereby the rocking of said lever will alternately extend the cutters.

In testimony whereof We affix our signal0 ALFRED E. PALIN. FRANK E. PALIN. 

